re: What policies that we have now will be a positive or negative in 20 years?

The ACA, almost by design, will implode the healthcare system resulting in a lower standard of care.

Things that are positives:
- Oddly enough, I think Ws war in Iraq will be a positive in that is has made Americans more reluctant to engage in war;
- I think the recognition by Obama that the US needs to be able to produce its own oil will bode well for the future - he gets bashed about Keystone and the like but has actually opened up, or at least not overtly precluded, other explorations that will be vital in the future (like the Dakotas and Tuscaloosa in SW MS).

Bad:
- ACA - the list of reasons is too long to even begin to mention.
- Open border policy is actually going to be bad in a number of ways, not the least of which for democrats will be running off the African American voting monopoly IMO
- The Fed continuing to prop up the market is creating a bubble that may make all other bubbles seem small by comparison when it pops
- Taking our eyes off of Iran during the Syria and ISIS mess is going to result in a nuclear Iran which changes the entire dynamic of that part of the world.